Filling or packing material



Jan. 8; 1935.

Filed Feb. 10, 1932 fizz/ 672757? Clarence QTHerbgZ, {By 4 H H L Q fi Z 1 u .I A 1 Q Patented Jan. 8, 1935 UNITED STATES PATENT OFFICE Application February 10, 1932, Serial No. 591,964

18' Claims.

The present invention relates to filling" or packing materials, and more particularly to fillor packing materials adapted for use in e'lectr'iea'l fuses;

8 Among the objects of the present invention is to provide a filling or packing material for use in packing articles, objects or elements to prevent these articles and the like from becoming displaced when moved or subjected to impactsand shocks which might be harmful" or cause damagethereto.

Another object within the of themeseht invention is to provide a novel packing or filling material adapted to surround articles, and

- the like, which includes an aggregate of coarse particles, the voids of which are substantially filled with an aggregate finer particles which interlock with the coarser particles to prevent their shifting which might cause damage to or injure the article or the like surrounded thereby.

Still another object of thepresent invention is to provide an electrical fuse in which novel meansis provided for efiectively holding the fusible element there'm against lateral displace- 25- ment; 7, i

In electrical fuses carrying ainslble element 'termi-nals'plov ided therein, it has been found that when the same is packed or surrormde'd by a; filling material inwhich the parti- 30 cles thereof aresubsmmiany ofunifoim diameter, there is a tendencygior' these particles to shift, thereby reducing the bulk seas to expose a substantial portion of the fusible e'lement'and to likewise'cause a 'lateralshifting or displace- 3 5 mentof this element. 7

Ityistherefori'ari object of the present inventic'ai'to providea novel-filling material in which the particles thereof are prevented from shiftwhich would cause a shifting or lateral dis- 40 placement of the fusible element which they surround;

The present invention contemplates the idea of providing a filling material for electrical fuses orthe l-ike, comprising a coarse aggregate, the voids of which arei'illed'by' particles of a finer aggregate;- these snialler particles of the liner aggregate tending 'to hold the particlescl coarser aggregate mtheir proper association with the fusible element, or othe'i'object and the like, 50 wme'rebythesame is efiectiv'ely' held against lat mil-slimme =01 displacement. More specinean the present invention is directed toward the prevlfliliglol a material in which the coarse Other objects, features, capabilities and advantages are comprehended by the invention, as will later appear and as are inherently possessed thereby. 7

Rcierrin'g to the drawing: Figure 1 is a view in cross section of an electrical ruse made in accordance with the present invention;

Figure 2 is a diagrammatic sketch of a filling material comprising coarse particles only; 7 Figure 3 isa diagrarmnatic sketch similar to that shown inFigure 2 0i the drawing and disclosing the shifting of this coarse material when us'edas a filler; Y

Figure 4 is a diagrammatic sketch of a filling material formed in accordance with the present disclosure; and

Figure 5 is a view in cross section taken in the plane represented by line 55 of Figure 1 of the drawing.

Referring now more in detailto the drawing, a filling material made in accordancewith the present invention is shown in connection with an electrical fuse comprising a tubular casing 2 of any desired material, such as fiberboard or the i like, the ends of this tubular casing being closed by the caps 4 and -6 which maybe suitably secured in' any desired manner to" the casing 2. Each of the caps 4 and 6 is similar in construction and is'for-med with an opening 8 adapted to receive the end of a fusible element 10 which extends between these caps and may be secured thereto, as by soldering the ends thereof in the openings of these caps. V i

In order to prevent lateral displacement of the fusible element 10, the space around the fusible-element i0 is filled with a filler comprisi'ng'fa' coarse aggregate 12 which may be of any desired material such as a granular substance, the voids between the particles of this coarse aggregate'being filled withone or more particles 14-0! anner aggregate.

as clearlyfshown in Figure? of the'draw-ing, a filling material merely comprisinga plurality of particles of a coarse aggregate 1-6 when placed within the casing 2 of anelectrical fuse such as shown, will compact and settle, whereby the particles of the coarse aggregate will tend to shiftupon one'another and into a position as shown in Figure 3 of the drawing. Any tendency toward therelative shifting 'or'these' coarse particles, when the same are around the fusible element 10, tends to cause a lateral displacement-of one-or more pcrtiaris olf-theiusible element 10 and to cause-an extenuation of these laterally" interlock the particles of the coarser aggregate;- thus preventing relative movement or shifting of the same. 7

From the above disclosure it will be quite apparent that the present novel filling ,or packing material is particularly adapted for protecting the fusible element of an electricalfuse, as for example, when this fuse is subjected to impact as when the same is put into place, or when shipped or moved from place to place. It is, of: course, understood, however, that a fusible element is merely representative of any other object, article, or member which it is desired to protect against displacement which would be harmful or injurious thereto and, accordingly the present invention contemplates the idea of providing novel means for effectively maintaining an object, article, or the like, in a given position once the same has been packed or surrounded in accordance with the present invention. Therefore,.articles or objects may be packed for shipment or moving within the scope of the present invention.

It will be clearly seen,- of course, that the present invention includes the idea of providing a packing or filling material which is preferably of granular particles, the desideratum being to provide an aggregate which has a specific gravity equal to the specific gravity of the. particles forming the same. Although it is not practically possible to provide an aggregate meeting this ideal situation or condition, it is, nevertheless, possible to increase the specific gravity of a given mass or aggregate of coarse particles by incorporating finer particles, thus filling the voids or interstices thereof so as to form an aggregate which has a specific gravity more nearly approaching the specific gravity of the individual particles.

Inpreparing an aggregate for the uses above set out, it has been found that amaterial having a mixture of about 10-20 mesh filler, 5% 30-40 mesh filler and 25% 50-60 mesh filler produces a filling material of maximum specific gravity. This filling material therefore comprises an aggregate of which 70% thereof will pass a 10 mesh screen but will remain on a 20 mesh screen; 5%.of which will pass a 30 mesh screen but will remain on a 40 mesh screen; and 25% of which will pass a 50 mesh screen but will remain on a 60 mesh screen. Although an aggregate mixed in accordance with these proportions is to be prefered, it is of course understood that other mixtures may likewise be used within the scope of the invention. v

While I have herein described andupon the drawing shown an illustrated embodiment of the invention, it isto be understood that the invention is not limited thereto but may comprehend other constructions, arrangements of parts, details and features without departing from the spirit of the invention.

. claim ,r V

1. In an electrical fuse, the combination of a casing a fusible element within said casing, and

a filling material surrounding said element including coarse and fine aggregates arranged to hold said element against lateral displacement.

2. In an electrical fuse, the combination of a casing, a fusible element within said casing, and a filling material of granular particles varying in size and arranged to hold said element against lateraldisplacement.

3. In an electrical fuse, the combination of a casing, a fusible element within said casing, and a filling material surrounding said element and including a coarse aggregate having the voids thereof yfilled with a finer aggregate.

4. In an electrical fuse, the combination of a casing, a fusible element within said casing, and a filling material surrounding said element and including an aggregate of granular particles comprising a coarse aggregate, the voids of said \coarse aggregate being filled with a finer aggregatewherebyshifting of said coarse aggregate is prevented. d l a 5. A filling material for electrical fuses, comprising an aggregate of coarseparticles having the voids thereof substantially filled with particles of a finer-aggregate. z

6. A filling and packing material, comprising an aggregate of particles having a specific gravity substantially equal to the specific gravity of said particles. a

7. A filling and packing material, comprising an aggregate of particles having a specific gravity approaching the specific gravity of said particles.

8. A filling and packing material comprising an aggregate including coarse particles, and finer particles for substantially filling the voids between said coarse particles.

9. A filling and packing material, comprising an aggregate includingcoarse granular particles, andfiner granular particles for substantially filling the voids between said coarse particles.

.10. A device for packing articles, comprising a casing, an article to be packed within said casing, and an aggregate of particles varying in size surrounding said article and adapted to arrange themselves to prevent displacement thereof when said device is moved. d

11. A device for packing articles, comprising a casing, an article to be packed within said casing, an aggregate including coarse particles around said article, .and finer particlesfor substantially, filling the voids between said coarse particles to prevent shifting of said particles and displacement of said article.- 12. A device for packing articles, comprising a casing, an article to be packed within said casing, an aggregate including coarse granular particles around said article, and finer granular particles for-substantially filling the voids between said coarse particles to prevent shifting of said particles and displacement of said article.

13. A filling and packing material, comprising a mixture of about 70% 10-20 mesh filler, about 5% 30-40 mesh filler, and about 25% 50-60 mesh filler adapted to produce a mixture of substantially maximum specific gravity.

14. A filling and packing material, comprising an aggregate of particles of varying sizes, the size of said particles being such that the voids of each size are substantially filled by particles of smaller diameter whereby the specific gravity of said aggregate approaches the specific gravity of the particles.

15. Afilling and packing material, comprising an aggregate ofparticles consisting of varying, percentages of particles of varying sizes to provide an aggregate having a specific gravity approaching the specific gravity of the particles.

16. In an electrical fuse, the combination of a housing, a fusible element normally spaced from said housing, and a filling material disposed around said element, said material comprising an aggregate of particles of varying sizes, the size of said particles being such that the voids of each size are substantially filled by particles of smaller diameter whereby the specific gravity of said aggregate approaches the specific gravity of the particles and adapted to arrange themselves to prevent displacement of said element when said fuse is moved.

17. In an electrical fuse, the combination of a housing, a fusible element normally spaced from said housing, and a filling material disposed around said element, said material comprising an aggregate of particles consisting of varying percentages of particles of varying sizes to provide an aggregate having a specific gravity approaching the specific gravity of the particles and adapted to arrange themselves to prevent displacement of said element when said fuse is moved.

18. In an electrical fuse, the combination of a housing, a fusible element normally spaced from said housing, and a filling material disposed around said element, said material comprising a mixture of about 70% 1020 mesh filler, about 5% 30-40 mesh filler, and about 25% 50-60 mesh filler adapted to produce a mixture of substantially maximum specific gravity.

CLARENCE A. HERBST. 

